多层结构体和多层管
By using a resin composition of ethylene-vinyl alcohol copolymer and acid-modified ethylene-α-olefin copolymer in resin-filled tubes, the cracking problem of multilayer structures during heat deformation is solved, achieving high gas barrier properties and crack resistance, making it suitable for automotive parts.
CN115666941BActive Publication Date: 2026-07-17KURARAY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KURARAY CO LTD
- Filing Date
- 2021-06-11
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
When resin-filled tubes are thickened and have a multi-layer structure including an EVOH layer, they are prone to cracking during heating and deformation operations, affecting gas barrier properties and reliability.
Method used
A resin composition comprising ethylene-vinyl alcohol copolymer and acid-modified ethylene-α-olefin copolymer is used to ensure the thickness and proportion of layer (X), combined with appropriate acid value and antioxidant, to form a multilayer structure to improve gas barrier properties and inhibit crack initiation.
Benefits of technology
It achieves high air barrier properties and crack suppression during heating and deformation, and is suitable for multi-layer structures and tubes in automotive parts.
✦ Generated by Eureka AI based on patent content.
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Figure CN115666941B_ABST
Abstract
提供阻气性高、且进行加热使其变形时的裂纹产生受到抑制的多层结构体和多层管。多层结构体，其具有包含树脂组合物(x)的至少1个层(X)，所述树脂组合物(x)包含乙烯‑乙烯醇共聚物(A)和酸改性乙烯‑α‑烯烃共聚物(B)，全部层的层数为3层以上，全部层的总厚度为500μm以上，层(X)的厚度为30μm以上，酸改性乙烯‑α‑烯烃共聚物(B)相对于乙烯‑乙烯醇共聚物(A)的质量比(B / A)为3 / 97以上且15 / 85以下，酸改性乙烯‑α‑烯烃共聚物(B)的酸值为8.5mgKOH / g以上且15mgKOH / g以下。
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